Frederick mutimer



(N0 Medal.)

F. MUTIMEB.

BOLT TRIMMING MACHINE. No. 427,437. Patented May 6, 18 90.

II 7 Q; 0 3 2 WHI ,ul 1 i 4 E mm aw .ll 5 23 d l E all l/[IIIIIIIIIIA J Znven'iof; g zmuzm w UNITED STATES PATENT Orricn.

FREDERICK MUTIMER, OF ROCKFORD, ILLINOIS, ASSIGNOR OF ONE HALF TO THE ROCKFORD BOLT IVORKS, OF SAME PLACE.

BOLT-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 427,437, dated May 6, 1890..

Application filed January 21, 1890- Serial No. 337,579. (No model.)

To all whom it may concern.-

Be it known that I, FREDERICK MUTIMER, a citizen of the United States, residing at Rockford, in the county of WVinnebago and State of Illinois, have invented certain new and useful Improvements in Bolt-Trimming Machines, of which the following is a specification.

The object of this invention is to trim off the flange or burr produced in the formation of the head, and which projects beyond the head of the bolt.

This invention consists of a stationary die the size and conformation of the head of the belt, a plunger for forcing the head of the bolt into the die, and means for operating the plunger, and in the various combination of elements and details of construction.

In the accompanying drawings, Figure 1 is a plan View of a machine embodying my in vention. Fig. 2 is a lengthwise vertical central section on dotted line a, Fig. 1, showing the parts in their retracted position. Fig. 3 is also a lengthwise central section 011 dotted 2 5 line a, Fig. l, with the parts in their forward position. Fig. 4 is a transverse vertical section on dot-ted line b, Fig. 1. Fig. 5 is a transverse vertical section on dotted line 0, Fig. 1, showing a face of the die. Fig. 6 is a transverse vertical section on dotted line a, Fig. 1, showing the means of holding the plunger in position. Fig. 7 is a lengthwise central section of the die and support for the free ends of the bolts when long bolts are operated 5 upon. Fig. 8 is an isometrical representation of a bolt, showing the flange which my improved trimming-machine is designed to remove. Fig. 0 is an isometrical representation of a bolt which has had the flange removed.

The bed portion or frame of the machine in this instance consists of lengthwise side rails l and end bars 2 connecting the side rails, making a frame rectangular in form. The side railshave their inner faces in grooved 5 guidewayform.

slide a support 3 for the plunger and other removable parts. This forward end of the support is composed of vertical sides 4: and bottom 5, leaving a square lengthwise opening. An endwise-sliding movement is imparted to this support by a crank 6, supported in bearings 7, rising from the side rails In the guideways is fitted to of the main frame, and which has a drivingwheel 8 mounted on its projecting end, which is connected to any prime mover by a belt passing around the wheel. The center portion of the crank is fitted with a head 9-, which slides in guideways l0 and 11 as it is revolved. The guideway 10 is an upright position of the support 3, and the guideway 11 is a separate piece joined to the support by a bar 12, as shown at Figs. 2 and 3, in such a manner as to make the guideways rigid with relation to each other. In the forward end of the support is secured a square block 6 5 13, having a cylindrical lengthwise opening 14, by bolts 15 passing through flanges 16 into the vertical sides l of the support. Within the cylindrical opening is fitted a tubular cylindrical shell 17 to slide therein. One

end 18 of this shell is closed and is of circular form and of somewhat larger diameter than the main portion of the shell, and has a central opening 19 of square former of the 0011- formation of the head of the bolt. This shell is guided in its sliding movement within the block 13 by an arm 20, rising upward and passing through a slide 21, which is held in place by plates 22, secured to the flanges 1G by bolts 23. These plates permit an easy end- Wise-sliding movement of the slide 21, said slide and shell moving in unison. From the upper face of the slide rise cars 24, which are perforated and support a bar 25 by a belt or rivet passing through the parts in such a man nor as to permit the bar to oscillate. The forward end of the bar is bifurcated, forming two projecting ears 26, which are perforated and between which is pivoted a vertical sliding arm 27, having its edges beveled, which fit 0 in guideways in the outer face of the closed end of the shell 17. A handle 28 has a pivotal connection with the rear end of the bar 25 and the lower end of the handle resting on the upperface of the slide 21. To the support in 5 rear of the block 13 is secured a cylindrical spindle 29 by its square end 30 being clamped by a cross-plate 81, held by bolts 32 to the vertical sides a of the support. This cylindrical spindle enters the shell 17 in a close-fitting IOO manner, and from its end projects a cylindrical plunger 31 of a size small enough to pass through the opening in the closed end of the shell.

A die-plate 33 is bolted in position on the side bars 1, a'face View of which is shown at Fig. 5. The opening 34 in the die-plate is of a size and conformation of the head of a bolt face of the slide 21, thereby depressing the vertical arm 27, the lower end of which will come in contact with the head of the bolt, clamping it in the opening 19 and holding its shank in a horizontal position, as shown at Fig. 2. Motion is then imparted to the support in its forward direction through the medium of the crank, sliding head, and vertical guideways. This movement carries the parts supported thereby forward until the flange on the head of the bolt comes in contact with the face of the stationary die. The shell will then remain at rest and the further forward movement of the support forces the plunger against the head of the bolt and forces the head into the die, thereby shearing the flange from the head, which will leave it in the condition shown at Fig. 9. The bolt and the parts will occupy the position shown at Fig. 3. As the support is withdrawn, all the parts supported thereby will move with it until an uprising projection 34, or the slide 2l,'comes in contact with an arm 35, secured to the rear frame of the machine, which will cause the shell 17 and parts connected thereto to remain at rest while the plunger continues to move rearward, when the parts will again occupy their former position. (Shown at Figs. 1 and 2.) While the shell is at rest the plunger moves rearward far enough to permit the insertion of the head of a bolt into the opening in the closed end of the shell, as before described' Then longer bolts are to be operated upon, then they can be safely supported by their heads alone. In the opening in the closed end of the shell I have constructed a support for their free ends, as shown at Fig. 7, which is a slide 36 fitted to move in the lengthwise direction of the bed of the machine, and having an arm 37, with a socket in its end, and an operating-handle 38, by means of which the slide is moved. The slide is moved by hand, so that the end of the bolt is received in the socket in the arm 37, and as the bolt is moved forward during the operations of removing its flange the slide will be forced forward until the bolt is free to drop.

By this construction of a bolt-trimming machine I can remove the flange from the head of a bolt in a uniform and satisfactory in anner, which will leave the head of the bolt smooth on all sides.

I claim as my invention 1. The combination of a die, means forholding a bolt, and a plunger, substantially as set forth.

2. The combination of adie, a movable head carrying a bolt, a plunger, and means for operating the head and plunger, substantially as set forth.

3. The combination of a die, a head supporting a bolt, a plunger, and means for operating the head and plunger, said head and plunger made movable independent of each other, substantially as set forth.

4. The combination of a die, and a support carrying a head and plunger, said support made movable to and from the die, substantially as set forth.

5. The combination of a die, a head and plunger having combined and separate movements to and from the die, substantially as set forth.

6. The combination of a die, a movable head and plunger, and a support for both ends of the bolt, substantially as set forth.

7. The combination of a die, a plunger, a head having an opening in its face, and means for holding the head of the bolt in said opening, substantially as set forth.

' FREDERICK MUTIMER.

WVitnesses:

CHARLES R. WIsE, R. O. BEHEL. 

